Hi There - There's been a lot of talk here recently about refinishing drums. Re-wrap, re-stain, re-chrome, etc... Any modification to a drum will lessen it's value to a collector. Certain modifications or upgrades may actually increase the value to a player, but it's not a given.
That said, it's generally considered a bad idea to refinish a vintage drum, unless the finish is really in sad shape. Even then, certain drums should never be refinished, e.g. 1920's Ludwig Black Beauty.
You have to decide which is more important to you - Resale value, or the look of the kit. I'm not sure how collectible a 1980's Tama kit is. My guess is "not very", but that could change in the future seeing as how many *American* drum companies now import their shells.
Can you post pics of the drums showing the wear and tear? Maybe some other folks could chime in and help you decide if they even need to be refinished.